Ibiza no question. Stop in playa d'en bossa much classier/cooler than San Antonio. Club tickets are expensive but worth it if you are into your music properly. Been to maga and kavos in the past but would never go back after going to Ibiza! Pukka up boat parties are good for daytime, dc-10 is in my opinion one of the best clubs in the world and just the chilled atmosphere in the daytime is something you don't get anywhere else. Plus not too many drunk dickheads kicking off for no reason. (You always get some but not as many in Ibiza from experience)